几道英语语法题，希望大家帮忙！

Question

1. if you want ＿. you have to get the fund somewhere
A. that the job is done B. the job done
C to have done the job D the job that is done
2.it looks ＿you are made a serious mistake
A. as B if C though D as though
这个我选了A麻烦帮我讲讲这几个的区别
3.we have done things we ought not to have done and ＿undone things we ought to have done
A leaving B will leave C left D leave
4.the radio of the work done by the machine ＿the work done on it is called the efficiency of the machine
A against B with C to D for
我语法不太好，希望讲详细点，谢过！

Answer 1

1.选B want sth, done 想让某事被怎样，工作是被做的，所以用被动
2. as是像。。。，if是如果，though是虽然，as though是好像，似乎，答案是D
你好像犯了个严重的问题
3. 答案应该是C,跟第二个单词“have"对应，现在完成式后面跟动词过去分词
4. 答案是C
to相当于数学中的“比”
一台机器完成工作的量比上该机器所做的工作叫做该机器的工作效率。”

希望能帮到您